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Quantitative detection method for organophosphorus pesticide in soil

A quantitative detection method and technology for organophosphorus pesticides, which are applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of unstable and reliable detection results, consumption of organic solvents, and time-consuming detection methods. The effect of stable results and reduced test costs

Active Publication Date: 2015-07-15
江苏太湖地区农业科学研究所
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Problems solved by technology

[0004] The present invention provides a quantitative detection method for organophosphorus pesticides in soil, the purpose of which is to solve the problem of long time-consuming, cumbersome operation, high consumption of organic solvents and insufficient stability and reliability of the existing detection methods for the determination of organophosphorus pesticides in soil. question

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  • Quantitative detection method for organophosphorus pesticide in soil
  • Quantitative detection method for organophosphorus pesticide in soil
  • Quantitative detection method for organophosphorus pesticide in soil

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Embodiment

[0039] Example: A Quantitative Detection Method of Organophosphorus Pesticides in Soil

[0040] The soil for testing is yellow loam, collected from tea gardens in Dongshan District, Suzhou, and the sampling depth is 0-15cm. Remove grass roots, stones and other sundries from the soil sample, mash it manually, mix thoroughly in a pot or other suitable container, and take a certain amount by quartering method for later use. The prepared soil sample should be analyzed as soon as possible, otherwise put it in -20 Stored in a refrigerator at ℃, the basic physical and chemical properties of the soil are: pH 4.1-4.7, clay content 14%-17%, organic matter content 23.41-59.83g / kg. The quantitative detection method consists of two parts:

[0041] The first part, establishes the standard curve of the measured organophosphorus pesticide of known gradient concentration with gas chromatography; The establishment of described standard curve is made up of the following steps:

[0042] The fir...

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Abstract

The invention discloses a quantitative detection method for an organophosphorus pesticide in soil. The method is characterized by comprising the following steps: carrying out ultrasonic extraction on a soil sample by using an acetonitrile solution of which the volume fraction is 1%; purifying by using proper mixed filler of PSA and C18; carrying out nitrogen blowing and concentrating on supernate until nearly dry; respectively dissolving and making to constant volume by using normal hexane; heating up and separating by using DB-1701 quartz capillary column program; carrying out GC / FPD detection; finally quantifying by using a matrix external standard method. A test proves that the method is wide in linear range, the technical indicators such as the detection sensitivity, the accuracy and the precision meet the requirements of residue analysis, the quantitative detection method is simple in pre-treatment operation, convenient and fast, and reliable means is provided for analysis and research of organophosphorus pesticide residue in the soil.

Description

technical field [0001] The present invention relates to the field of detection methods for pesticide residues, in particular to a quantitative detection method for organophosphorus pesticides in soil. Phosphorus pesticides are detected in order to achieve the purpose of fast, simple and reliable. Background technique [0002] Organophosphorus pesticides (Organophosphorus pesticides) are a class of chemical pesticides widely used in various regions of my country at present. They have the characteristics of broad spectrum, high efficiency, economy, many varieties, and low dosage. . However, studies have confirmed that such pesticides can have toxic effects on the nervous system of the human body. Some varieties have carcinogenic, teratogenic, mutagenic effects and certain accumulation properties. Excessive use may accumulate in the human body, resulting in chronic accumulation poisoning. In the process of crop pest control, the proportion of pesticides directly scattered on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N30/02G01N30/06
Inventor 杨代凤刘腾飞董明辉陆皓茜邓金花张丽顾俊荣
Owner 江苏太湖地区农业科学研究所
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